降水带的复杂运动
Complex motion of precipitation bands
摘要：
本文研究了NaOH向AlCl_3凝胶中扩散形成Al（OH）_3沉淀环的过程及其动力学。有限的进料的外部电解质（NaOH）被发现产生一个复杂的环动力学，其中包括停止和反转的沉淀环的运动方向，并演变成静止的多环结构。环动力学模型的开发相分离的情况下，沉淀物的再溶解（复杂的形成）在过量的外部电解质相结合。
英文摘要：
Formation and dynamics of an Al(OH)_3 precipitation ring is studied by diffusing NaOH into a gel containing AlCl_3. Limited feeding of the outer electrolyte (NaOH) is found to yield an intricate ring-dynamics which involves stopping and reversal of the direction of motion of the precipitation ring, and evolution into stationary multi-ring structures. A model of the ring-dynamics is developed by combining a phase separation scenario for the precipitation with the redissolution (complex formation) of the precipitate in the excess of the outer electrolyte.
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